Virgil Donati is an Australian drummer, composer and producer. He holds the drum sticks in the traditional style and is also proficient at the keyboard. Donati formed Planet X with Derek Sherinian and was the band's principal composer on all their albums. He also performed in Melbourne with Jack Jones in a Van Halen tribute band known as Hans Valen before inviting Jones into Donati's own bands The State and Southern Sons. Donati is widely regarded as one of the most technically advanced drummers of all time.

Derek Sherinian is an American keyboardist of Armenian descent who has toured and recorded for Alice Cooper, Billy Idol, and Joe Bonamassa, among others. He was also a member of Dream Theater from 1994 to 1999, is the founder of Planet X and also one of the founding members of Black Country Communion, Sons of Apollo, and Whom Gods Destroy. He has released nine solo albums that have featured a variety of prominent guest musicians, including guitarists Slash, Yngwie Malmsteen, Allan Holdsworth, Steve Lukather, Joe Bonamassa, Michael Schenker, Steve Vai and Al Di Meola, and extensively drummer Simon Phillips.